250 ZOOPHYTES. 



57. ASTRJEA HELIOPORA. (Lamarck.) 



A. planulata. Coralium cellis orbiculatis, majusculis, multiradiatis, 

 margine separates; lamellis extus superneque incrassatis ; centra pa- 

 pilloso. 



Planulate. Coralium with the cells circular, rather large, many-rayed, 

 the lamellae separated along the ridges between the cells, incrassate 

 above and without ; centre papillose. 



The " Austral Seas." Lamarck. 



Lamarck states that this handsome species has the stars but little 

 excavate, neatly rayed, with the lamellae thickened above, especially 

 towards the margin of the cells, and a furrow along the ridges. 



Astrcea heliopora, Lamarck, ii. 415, No. 24. Astrcea heliopora, Blainville, Man. 369. 



NOTE. Figures 11 a, 11 b, pi. 13, represent sections (natural size) of a coral from 

 Wakes Island, Pacific Ocean, which we have been unable to refer to any described species. 

 May it be the above? It is a heavy coral, characterized by large stars, very stout 

 lamellae, and coarse cellules. 



58. ASTR.EA HEMPRICHII. (Ehrenberg.) 



Coralium cellis incequalibus, 5-5J"' latis, pentagonis aut hexagonis, sub- 

 prof undis; inter stitiis acute cristatis; lamellis valide denticulatis. 



Coralium with the cells unequal, 5 to 5 lines broad, pentagonal or 

 hexagonal, rather shallow ; interstices acutely cristate ; lamellee 

 strongly denticulate. 



The Red Sea. Ehrenberg. 



Astrcea Hemprichii, Ehrenberg, op. cit. G. Ix. sp. 9. 



59. ASTR.EA HALICORA. (Ehrenberg.} 



A. globosa. CoraUum cellis 3J'" latis, scepe pentagonis, subprofundis ; 

 lamellis stellarum contiguarum continuis, interdum alternis, intersti- 

 tio nullo. 



